Simulation of Countercurrent Multi-effect Drying System
The paper bulids a countercurrent multi-effect drying process model which can be expressed as a linear programming(LP) problem with the minimum total energy consumption as target function.Based on the model it can be conventient to solve the heat load,degree of drying and other drying parameters of each effect.And it realizes the mathematical simulation an analysis of multi-effect drying process.Such process not only reuses the secondary steam but also utilizes the high energy grade.Drying silica sand using 1-effect drying to 5-effect drying is presented as an example.The energy consumption and energy saving rate are compared by using co-current multi-effect drying and countercurrent multi-effect drying.As a summary,the countercurrent multi-effect drying is better than co-current drying.Considered the equipment investment and energy conservation,the study also concluded that the countercurrent 4-effect drying is the optimum selection,and it can save 57.6% energy compared to countercurrent 1-effect drying.
countercurrent drying multi-effect drying secondary steam LP
LI Hong WU Lianying WU Xianli HU Yangdong
Department of Chemical Engineering,Ocean University of China, Qingdao 266000, China
国际会议
北京
英文
206-211
2012-10-26（万方平台首次上网日期，不代表论文的发表时间）